Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Tara Maria Ostrom, MD

Individual provider Internal Medicine Physician · NPI 1124017009

Tara Maria Ostrom, MD practises Internal Medicine in Phoenix, Arizona. Graduated from University of Southern California Keck School of Medicine in 1996, 30 years ago. Practices with Greater Phoenix Collaborative Care PC, a 111-clinician group and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
30
Trained at
University of Southern California Keck School of Medicine
Licensed in
AZ
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

20040 N 19th Ave Ste A
Phoenix, AZ 85027-4255
Phone: (623) 869-5000
Fax: (623) 869-0927
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 26889 (AZ)

Record details

NPI number1124017009
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 13, 2005
Last updated in NPPESJanuary 27, 2017

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Greater Phoenix Collaborative Care Pc — 111 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients62
Services billed 170 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Greater Phoenix Collaborative Care PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 111 clinicians in the practice; 12 are shown here.

Other providers in Phoenix